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48 Cards in this Set
- Front
- Back
locomotion
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the interaction of muscles with the skeleton that results in body movements
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what does locomotion do for organisms?
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allows organism to gather food, seek shelter, and escape dangerous situation00increases chances for survival of a species by enabling members nof the species to find suitable mates
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what does human locomotion involve?
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joints and tissues such as bone, cartilage, muscles, tendons, and ligaments
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bones
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type of connective tissue composed mainly of calcium compounds --
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why is the bone hard??
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due to the presence of calcium and phosphorus minerals
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what are bones important for??
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-make up major part of framework of the human endoskeleton
-provide a place for muscle attachment |
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long bones
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bones of your arms and legs
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what are the ends of long bones covered with?
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cartilage
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periosteum
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tough membrane--outer covering of long bones
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marrow
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inner tissue of some bones where red and white blood cells are produced
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endoskeleton
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an inner skeleton
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what does the endoskeleton do?
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it acts are a franework for supporting other organs of the body.
-it produces internal organs and allows body movement |
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how many bones does the human endoskeleton have?
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206 bones
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was is the endoskeleton composed of?
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skull, vertebral column (spinal column), breastbone and ribs, and limbs (arms and legs)
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cartilage
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the fibrous, flexible, elastic connective tissue found in the human skeleton.
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where is cartilage found in adults?
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in the nose, ears, and trachea (flexible support), at the ends of ribs and other bones (flexibility), and between the vertebrae and bones (cushioning)
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joints
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bones connected at places--allow bone movement
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ball and socket joints
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permit circular movement--located at the hip and shoulder
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hinge joints
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-allow back and forth movement--located at elbows and knees
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pivot joints
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permit roatating movement--lockated where skull joins the vertebral column
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gliding joints
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allow a sliding action--located at wrist and ankle
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fused joints
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not movable and located in the skull--help keep joints cushioned and lubricated
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muscles
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produce body movement by pulling on bones when they contract--produce body heat when they contract
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3 kinds of muscle tissue
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skeletal, smooth, and cardiac
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involuntary muscles
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responsible for involuntary body activities such as heart contractions and peristalsis--you cannot control the actions of involuntary muscles
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TWO EXAMPLES OF INVOLUNTARY MUSCLES
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smooth muscle and cardiac muscle
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smooth muscle
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found in the walls of arteries and organs of the body--contraction of smooth muscle is controlled by the nervous system
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cardiac muscle
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found in the walls of the heart-causes the heart to beat
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voluntary muscles
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attach to the skeleton and can be controlled for locomotion
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example of voluntary muscle
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skeletal (striated) muscle
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skeletal/striated muscle
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are attached to the bones of the skeleton--bones and body parts are moved by the contraction of these muscles
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how do skeletal muscles usually function?
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in opposite pairs
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extensor
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one muscle of the pair of skeletal muscles, which extends (straightens) the limb
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flexor
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the other muscle of the skeletal muscle pair, which bends the limb
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example of extensor and flexor pair
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biceps and triceps of the upper arms
-bicep--flexor--located on the front of the upper arm--when the bicep contracts, the forearm is pulled toward the front of the shoulder, causing the arm to bend -tricept-extensor--located on the back of the upper arm--when the tricept contracts, the arm straightens out |
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what causing muscles to contract??
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when nerves direct impulses to muscles
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where do muscles get the energy needed to contract?
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comes from energy stored in chemicals such as glycogen
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muscle fatigue
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muscle cells will continue to operate even if they do not receive sufficient oygen for aerobic respiration, so they change to anaerobic respiration and produce lactic acid, which causes muscles to hurt and causes you to rest so taht your muslces can get oxygen again
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what are tendons and ligaments composed of?
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connective tissue
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tendons
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bands of dense tissue that connect muscles to bones
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ligaments
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tough bands of tissue that hold bones together at joints
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fractures
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broken bones
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sprain
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tearing or stretching of the ligaments that hold together the bone end in a joint
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hernias
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an organ or tissue sticks out through a weak area in the muscle or other tissue that usually contains it such as the abdominal wall. the cause is usually weakness and a bulge in the wall
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arthritis
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inflammation of joints--causes stiffness, swelling, soreness, or pain
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osteoarthristis
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a type of arthritis that results from wear and tear on the cartilage at the joints
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rheumatoid arthritis
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causes swelling and pain and can occur at any age--
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tendonitis
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inflammation of a tendom, usually at the bone junction
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